feat: add tier badges to marketplace UI

- Show 'core' (orange) and 'recommended' (blue) badges next to app titles
- getAppTier() classifies apps matching backend get_app_tier()
- Global .tier-badge, .tier-badge-core, .tier-badge-recommended CSS classes

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/views/Marketplace.vue

@@ -150,7 +150,14 @@
               </svg>
             </div>
           <div class="flex-1">
-            <h3 class="text-xl font-semibold text-white mb-1">{{ app.title }}</h3>
+            <h3 class="text-xl font-semibold text-white mb-1">
+              {{ app.title }}
+              <span
+                v-if="getAppTier(app.id) !== 'optional'"
+                class="tier-badge"
+                :class="getAppTier(app.id) === 'core' ? 'tier-badge-core' : 'tier-badge-recommended'"
+              >{{ getAppTier(app.id) }}</span>
+            </h3>
               <p class="text-sm text-white/60">{{ app.version ? `v${app.version}` : 'latest' }}</p>
               <p v-if="app.author" class="text-xs text-white/50 mt-1">by {{ app.author }}</p>
           </div>
@@ -730,6 +737,15 @@ async function loadCommunityMarketplace() {
   loadingCommunity.value = false
 }
 
+// Get app tier classification (matches backend get_app_tier)
+function getAppTier(appId: string): string {
+  const core = ['bitcoin-knots', 'bitcoin', 'lnd', 'mempool', 'electrs', 'btcpay-server', 'dwn', 'filebrowser']
+  const recommended = ['fedimint', 'vaultwarden', 'uptime-kuma', 'grafana', 'searxng', 'tailscale', 'portainer']
+  if (core.includes(appId)) return 'core'
+  if (recommended.includes(appId)) return 'recommended'
+  return 'optional'
+}
+
 // Curated list of apps with Docker Hub images
 function getCuratedAppList() {
   return [